import re

import sys

def extract_tokens(log_line):

"""Extracts authentication tokens from a log line using regex."""

# Define a regex pattern to match common token formats. Adjust as needed.

token_pattern = r"Bearer ([\w-]+)" # Example: "Bearer <token>"

match = re.search(token_pattern, log_line)

if match:

return match.group(1) # Return the token value

else:

return None

def monitor_tokens(log_file):

"""Reads a log file and extracts authentication tokens."""

try:

with open(log_file, 'r') as f:

for line in f:

token = extract_tokens(line)

if token:

print(token) # Output the token. Can be modified to store/process.

except FileNotFoundError:

print(f"Error: Log file '{log_file}' not found.")

sys.exit(1)

except Exception as e:

print(f"An error occurred: {e}")

sys.exit(1)

if __name__ == "__main__":

if len(sys.argv) != 2:

print("Usage: python token_extractor.py <log_file>")

sys.exit(1)

log_file = sys.argv[1]

monitor_tokens(log_file)